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MTD 668 lawn tractor Parts
Here are the diagrams and repair parts for MTD 668 lawn tractor, as well as links to manuals and error code tables, if available.
Owner’s manual
By Schematic
By Part
SELECT DIAGRAM
Browse Parts for 668 Riding Mowers & Tractors
Steering wheel diagram
Ferrule 3/8-
Part #711-04059Replaced by #911-04059
Manufacturer substitutionThis part replaces 711-04059. Substitute parts can look different from the original.In Stock$41.43
Qty
Blades diagram
Spacer
Part #750-0932AReplaced by #950-0932A
Manufacturer substitutionThis part replaces 750-0932A. Substitute parts can look different from the original.This item is not returnableIn Stock$29.87QtySeat diagram
Seat
Part #757-04021Replaced by #757P06245
Manufacturer substitutionThis part replaces 757-04021. Substitute parts can look different from the original.In Stock$261.45QtyEngine diagram
Oil Drain Cap
Part #751-3142Replaced by #951-10517A
Manufacturer substitutionThis part replaces 751-3142. Substitute parts can look different from the original.This item is not returnableIn Stock$34.5115% OFF Phone Price : $40.51
QtyTransaxle diagram
Extension Spring
Part #732-04050AReplaced by #732-04050D
Manufacturer substitutionThis part replaces 732-04050A. Substitute parts can look different from the original.In Stock$52.08QtyBrake assembly diagram
Thrust Washer
Part #736-0519Replaced by #936-0519
Manufacturer substitutionThis part replaces 736-0519. Substitute parts can look different from the original.This item is not returnableIn Stock$9.34QtyAir Valve
Part #734-0255Replaced by #934-0255
Manufacturer substitutionThis part replaces 734-0255. Substitute parts can look different from the original.This item is not returnableIn Stock$7.5412% OFF Phone Price : $8.54QtyBlades diagram
Extension Spring
Part #732-0594AReplaced by #932-0594A
Manufacturer substitutionThis part replaces 732-0594A. Substitute parts can look different from the original.In Stock$23.0221% OFF Phone Price : $29.02QtyThrottle Cable
Part #746-04023AReplaced by #946-04023B
Manufacturer substitutionThis part replaces 746-04023A. Substitute parts can look different from the original.In Stock$50.5111% OFF Phone Price : $56.51QtyTransaxle diagram
Shield Bolt
Part #738-0322Replaced by #738-0322A
Manufacturer substitutionThis part replaces 738-0322. Substitute parts can look different from the original.In Stock$12.46Qty
Most common symptoms to help you fix your riding mowers & tractors
Choose a symptom to see related riding mower and lawn tractor repairs.
Main causes: damaged tie rods, bent or worn wheel spindle, worn front axle, damaged sector gear assembly…
Main causes: dead battery, stale fuel, bad starter solenoid, ignition system problem, bad ignition interlock switch, clo…
Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged ma…
Main causes: engine overfilled with oil, leaky head gasket or sump gasket, damaged carburetor seals, cracked fuel pump, …
Main causes: punctured tire or inner tube, leaky valve stem, damaged wheel rim…
Main causes: unlevel mower deck, dull or damaged cutting blades, worn mandrel pulleys, bent mower deck, engine needs tun…
Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, …
Main causes: faulty battery, bad alternator…
Main causes: shift lever needs adjustment, neutral control needs adjustment…
Most common repair guides to help fix your riding mowers & tractors
These step-by-step repair guides will help you safely fix what’s broken on your riding mower or lawn tractor.
How to replace the starter solenoid on a riding lawn mower
Replace the starter solenoid if it doesn't click when you turn the ignition key.…
Repair time and Difficulty
30 minutes or less
How to replace a riding lawn mower ignition coil
If you're not getting spark from a good spark plug, the problem could be the ignition coil. Follow these step-by-step in…
Repair time and Difficulty
30 minutes or less
How to replace a riding lawn mower fuel filter
Help your mower run better by replacing the fuel filter during your riding mower's annual tune-up.…
Repair time and Difficulty
15 minutes or less
Effective articles & videos to help repair your riding mowers & tractors
Use the advice and tips in these articles and videos to get the most out of your riding mower or lawn tractor.
Get answers to frequently asked questions about Sears and Sears PartsDirect.…
Learn some of the most common symbols found in a wiring diagram and what they mean.…
Learn how to connect cables safely to jump-start your mower’s battery.…
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